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Germanium-on-carborundum surface phonon-polariton infrared metamaterial

Germanium-on-carborundum surface phonon-polariton infrared metamaterial
Germanium-on-carborundum surface phonon-polariton infrared metamaterial
Surface phonon-polaritons in thin layers of high-index dielectric structures are emerging as promising excitations for the exploitation in high density photonic devices. Here, a midinfrared phononic-dielectric metamaterial, a two-dimensional periodic array of germanium discs on silicon carbide (carborundum) is demonstrated. It is shown that the metamaterial can support sharp resonances at the free space wavelength that is at least ten times larger than lattice parameter of the array. With germanium discs with thickness of 120 nm and diameter of 1 μm a metamaterial resonance at the wavelength of 11 μm is observed. A blueshift of the resonant frequency observed upon increase of the disk size is related to the anomalous dispersion of surface polaritons at germanium carborundum interface. It is argued, that such surface phonon-polariton metamaterial is a promising platform for applications where enhanced homogeneity of optical response is required, such as imaging, holography and cloaking.
2195-1071
Qiang, Bo
e92401c1-a870-40c2-91d7-ab70fa7a2ecd
Dubrovkin, Alexander M.
4642c9a6-f867-4754-ba09-c908dfe36820
Krishnamoorthy, Harish N.S.
87456c53-9077-4ccf-80b9-44470ad845b9
Wang, Qian
8fdfc49b-7545-4455-b04d-43cf2ce251ad
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Wang, Qi Jie
ac7c8fe8-97d2-4306-87ab-c604fbdc02f7
Qiang, Bo
e92401c1-a870-40c2-91d7-ab70fa7a2ecd
Dubrovkin, Alexander M.
4642c9a6-f867-4754-ba09-c908dfe36820
Krishnamoorthy, Harish N.S.
87456c53-9077-4ccf-80b9-44470ad845b9
Wang, Qian
8fdfc49b-7545-4455-b04d-43cf2ce251ad
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Wang, Qi Jie
ac7c8fe8-97d2-4306-87ab-c604fbdc02f7

Qiang, Bo, Dubrovkin, Alexander M., Krishnamoorthy, Harish N.S., Wang, Qian, Zheludev, Nikolai and Wang, Qi Jie (2020) Germanium-on-carborundum surface phonon-polariton infrared metamaterial. Advanced Optical Materials.

Record type: Article

Abstract

Surface phonon-polaritons in thin layers of high-index dielectric structures are emerging as promising excitations for the exploitation in high density photonic devices. Here, a midinfrared phononic-dielectric metamaterial, a two-dimensional periodic array of germanium discs on silicon carbide (carborundum) is demonstrated. It is shown that the metamaterial can support sharp resonances at the free space wavelength that is at least ten times larger than lattice parameter of the array. With germanium discs with thickness of 120 nm and diameter of 1 μm a metamaterial resonance at the wavelength of 11 μm is observed. A blueshift of the resonant frequency observed upon increase of the disk size is related to the anomalous dispersion of surface polaritons at germanium carborundum interface. It is argued, that such surface phonon-polariton metamaterial is a promising platform for applications where enhanced homogeneity of optical response is required, such as imaging, holography and cloaking.

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More information

Accepted/In Press date: 4 December 2020
e-pub ahead of print date: 18 December 2020

Identifiers

Local EPrints ID: 446111
URI: http://eprints.soton.ac.uk/id/eprint/446111
ISSN: 2195-1071
PURE UUID: 59e8866a-a996-4325-bf98-1130f029633b
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 20 Jan 2021 17:32
Last modified: 26 Nov 2021 02:36

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Contributors

Author: Bo Qiang
Author: Alexander M. Dubrovkin
Author: Harish N.S. Krishnamoorthy
Author: Qian Wang
Author: Qi Jie Wang

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